Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 33447.55 
• Atom Count: 2502 
• Residue Count: 306 
• Unique protein chains: 1

4A7T

Structure of human I113T SOD1 mutant complexed with isoproteranol in the p21 space group

• DOI: 10.2210/pdb4A7T/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): 1 


• Deposited: 2011-11-14 Released: 2012-11-28 
• Deposition Author(s): Wright, G.S.A., Kershaw, N.M., Antonyuk, S.V., Strange, R.W., ONeil, P.M., Hasnain, S.S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.188 
• R-Value Work: 0.157 

Literature

Ligand Binding and Aggregation of Pathogenic Sod1.

Wright, G.S.A., Antonyuk, S.V., Kershaw, N.M., Strange, R.W., Hasnain, S.S.

(2013) Nat.Commun. 4: 1758

• PubMed: 23612299 
• DOI: 10.1038/ncomms2750
• Primary Citation of Related Structures:  
  4A7V, 4A7U, 4A7S


• PubMed Abstract: 
  

Mutations in the gene encoding Cu/Zn superoxide dismutase-1 cause amyotrophic lateral sclerosis. Superoxide dismutase-1 mutations decrease protein stability and promote aggregation. The mutant monomer is thought to be an intermediate in the pathway from the superoxide dismutase-1 dimer to aggregate. Here we find that the monomeric copper-apo, zinc-holo protein is structurally perturbed and the apo-protein aggregates without reattainment of the monomer-dimer equilibrium. Intervention to stabilize the superoxide dismutase-1 dimer and inhibit aggregation is regarded as a potential therapeutic strategy. We describe protein-ligand interactions for two compounds, Isoproterenol and 5-fluorouridine, highlighted as superoxide dismutase-1 stabilizers. We find both compounds interact with superoxide dismutase-1 at a key region identified at the core of the superoxide dismutase-1 fibrillar aggregates, β-barrel loop II-strand 3, rather than the proposed dimer interface site. This illustrates the need for direct structural observations when developing compounds for protein-targeted therapeutics.

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Organizational Affiliation: 

Molecular Biophysics Group, Institute of Integrative Biology, Faculty of Health and Life Sciences, University of Liverpool, Liverpool L69 7ZB, UK.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
SUPEROXIDE DISMUTASE [CU-ZN]	A, F	153	Homo sapiens	Mutations: T113I Gene Names: SOD1 EC: 1.15.1.1
Find proteins for P00441 (Homo sapiens) Go to Gene View: SOD1 Go to UniProtKB:  P00441

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ZN	A, F	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
SO4	A, F	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
ACT	A, F	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M
CU	A, F	COPPER (II) ION Cu JPVYNHNXODAKFH-UHFFFAOYSA-N
5FW	A, F	ISOPRENALINE C11 H17 N O3 JWZZKOKVBUJMES-NSHDSACASA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.188 
• R-Value Work: 0.157 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 37.890	α = 90.00
b = 68.020	β = 103.95
c = 49.310	γ = 90.00

Software Package:

Software Name	Purpose
XDS	data scaling
REFMAC	phasing
XDS	data reduction
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-11-14 
• Released Date: 2012-11-28 
• Deposition Author(s): Wright, G.S.A., Kershaw, N.M., Antonyuk, S.V., Strange, R.W., ONeil, P.M., Hasnain, S.S.

Revision History 

• Version 1.0: 2012-11-28
  Type: Initial release
• Version 1.1: 2013-04-24
  Type: Database references
• Version 1.2: 2013-05-08
  Type: Database references